Well, one thing for certain -- if you have fungus gnats, the potting mix is too wet.

And that crusty looking stuff on the surface of the potting mix often means one of several things:
-- poor drainage
-- excess fertilizer
-- watering practices that don't allow for drainage

Beyond that, do the cups have drain holes?

Many people think that if the leaves of the plants they are growing start to turn yellow, chlorosis, they must have a Nitrogen defieciency. However that is an indication of many problems, not just a Nitrogen deficiency and what it might be depends on how the leaves are turning yellow.
As Jean suggests a growing medium that is too wet can cause a number of problems including the appearance of a nutrient deficiency. Nutrient imbalances can cause nutrient deficiencies because often an excess of one nutrient can prevent a plant from properly utilizing others.
Perhaps this link can be of some help.

Here is a link that might be useful: Plan Nutrient Deficiencies

Hi Jean, I believe my mix was loaded with eggs, and I water the least that I can. I let them dry out to point that the cups dont have very much weight to them. Then I bottom water sometimes with camomile tea diluted (1 bag/gallon). The cups have 3 or 4 1/2" holes in the bottom. I will stop the fertilizer too.

The pics came from the t5 setup but it seems to be happening to my t8 setup as well.

Thanks :)

Hi Kimmsr, The jump start is high in (P) in comparison to the rest. On some of my seedlings they have started to increase fans already, Im not sure if that is normal for 3 month old seedlings? or if that is a bi product of over fertilizing especially with (P). Thanks for the article btw :)

i would NEVER try to deal with nitro in tiny little pots.. other than a general very diluted water soluable fert ..

if you used NEW media.. there is no possible way.. inside the short time it has taken to grow these seeds .. that there is a significant lack of nitro ... and if you reused old media.. there is probably your problem ...

see link about sterilizing media.. i never had a bug problem after i started doing such.. regardless of whatever claims are made on the bag ...

that said.. did anyone ask or mention about LACK OF PROPER LIGHT????

and finally.. in the house.. with a forced air furnace.. managing all the variables.. is extremely hard.. and in my experience.. old leave yellow.. pull or cut them off .... so what.. you are growing the middle growth point.. when that yellows.. you have a problem.. otherwise.. your problem is simply that your house is not a climate controlled greenhouse.. balanced to perfection ...

IMHO.. you should be very proud of what you accomplished.. now quit helicoptering them.. and potentially loving them to death.. by trying to get all fancy-dancy with them..

if you really think they have a media problem.. crikey .... repot them in fresh sterilized media.. that is the fast and quick method to solve all your problems ... or just hang on for the few more weeks it will take for you to throw them outside ... [you do know about hardening off the sunshine i hope] .... really now.. they are daylily.. you probably cant kill them ... unless you love them to death .... . so repot ...

ken

Here is a link that might be useful: link

Hi Ken, Thanks for your thoughts! I am circling the wagons a bit lol. I sterilized about half of my seedling mix after I saw how many bugs were in it. Those seem to be doing well. If they are stressed is it still ok to transplant? Like you said they will be going outside pretty soon. hopefully after this last cold front this weekend.

Someone on the daylily page thought it might be the bugs eating on roots. I guess I could pull one out and see right?

I was thinking lighting too, I have about 20,000 lumens on them now, but with quite a few seedlings. I am trying to be successful because if they die my wife will make fun of me and not allow me to do this again :)

Thanks Ken!

The bugs eating the roots could be the young stage of the fungus gnts.

What did you use for potting mix?
If potting soil, it shouldn't have had gnat eggs in it unless the mix was already wet.

Further, fungus gnat eggs are so small I doubt the average person would even see them

If you happened to take a picture of the eggs, please post it.

Hi Jean I used a pro mix Batco I believe, it did come pre moistened. Ill try to get some better pics. After I saw how many gnats came out of the first batch, I microwaved after that. I set out yellow traps and they filled up quickly. Not to many anymore, but maybe I should do a mosqito dunk I heard that works well.